[vala/0.48] tests: Add "g-interface-info" dbus test to increase coverage

[Rico Tzschichholz <ricotz src gnome org>]

commit 15a4a498283457adfadafb8250adec421cd64ef9
Author: Corentin Noël <corentin elementary io>
Date:   Fri Apr 3 12:53:27 2020 +0200

    tests: Add "g-interface-info" dbus test to increase coverage

 tests/Makefile.am              |  1 +
 tests/dbus/interface-info.test | 59 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index cca6a2927..88aaac40a 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -589,6 +589,7 @@ TESTS = \
        dbus/bug783002.test \
        dbus/bug792277.vala \
        dbus/rawvariants.test \
+       dbus/interface-info.test \
        gir/bug651773.test \
        gir/bug667751.test \
        gir/bug742012.test \
diff --git a/tests/dbus/interface-info.test b/tests/dbus/interface-info.test
new file mode 100644
index 000000000..65ec21983
--- /dev/null
+++ b/tests/dbus/interface-info.test
@@ -0,0 +1,59 @@
+Packages: gio-2.0
+D-Bus
+
+Program: client
+
+[DBus (name = "org.example.Test")]
+interface Test : Object {
+       [DBus (name = "Baz")]
+       public signal void bar (string j);
+}
+
+MainLoop main_loop;
+
+void main () {
+       // client
+       Test test = Bus.get_proxy_sync (BusType.SESSION, "org.example.Test", "/org/example/test");
+
+       unowned DBusInterfaceInfo? iface_info = (DBusInterfaceInfo?) typeof (Test).get_qdata 
(Quark.from_string ("vala-dbus-interface-info"));
+       assert (iface_info != null);
+       assert (iface_info.signals != null);
+       assert (iface_info.signals[0] != null);
+       assert (iface_info.signals[0].name == "Baz");
+       assert (iface_info.signals[0].args != null);
+       assert (iface_info.signals[0].args[0] != null);
+       assert (iface_info.signals[0].args[0].signature == "s");
+}
+
+Program: server
+
+[DBus (name = "org.example.Test")]
+class Test : Object {
+       public signal void foo (int i);
+}
+
+MainLoop main_loop;
+
+void client_exit (Pid pid, int status) {
+       // client finished, terminate server
+       assert (status == 0);
+       main_loop.quit ();
+}
+
+void main () {
+       var conn = Bus.get_sync (BusType.SESSION);
+       conn.register_object ("/org/example/test", new Test ());
+
+       // try to register service in session bus
+       var request_result = conn.call_sync ("org.freedesktop.DBus", "/org/freedesktop/DBus", 
"org.freedesktop.DBus", "RequestName",
+                                             new Variant ("(su)", "org.example.Test", 0x4), null, 0, -1);
+       assert ((uint) request_result.get_child_value (0) == 1);
+
+       // server ready, spawn client
+       Pid client_pid;
+       Process.spawn_async (null, { "dbus_interface_info_client" }, null, SpawnFlags.DO_NOT_REAP_CHILD, 
null, out client_pid);
+       ChildWatch.add (client_pid, client_exit);
+
+       main_loop = new MainLoop ();
+       main_loop.run ();
+}